Guide on adding a new model, animation, and creature to HoMMV

Yes, you import the animation file in GR2 format into 3ds max, and you get a skeleton with animation.

Added 1 hour 28 minutes ago
I found another program (Noesis) that can extract animations into various formats (including FBX, SMD, PSK-PSA).
For the plugin in the program to correctly process the files, the files must have the *.gr2 extension.
The plugin was taken from here - https://forum.xentax.com/viewtopic.php?f=16&t=22277.

In principle, it is possible - if I remember correctly, with the help of ARKHANGEL, you can extract a model and a skeleton that are not linked (then you need to do skinning of the model), and with the help of a plugin for 3DS Max 2008, you can load the skeleton and animation.
Also, the model can be loaded into 3ds Max, after предварительно processing the model file from the game with the program mesh2wrl_by_CrazyPill (without a skeleton).